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MEDIUM severity

CVE-2022-0437 — karma

MEDIUMFix: karma-runner/karma@839578c

CVE-2022-0437 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in karma. 1 public exploit reference exists, so weaponization risk is real. A fix is available for karma — see the affected versions and patch details below.

Cross-site Scripting (XSS) - DOM in karma-runner/karma

Also known asGHSA-7x7c-qm48-pq9c
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
15.1%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs97th percentile — riskier than 97% of all scored CVEsHighest risk
12.2%17.3%22.4%27.5%24.6%15.1%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2022-0437 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the 10–50% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

1Kother npm packages depend on this — each one inherits the vulnerability until it's patched upstream
karmanpm
3.1Mdownloads / week

Description

Cross-site Scripting (XSS) - DOM in NPM karma prior to 6.3.14.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmkarmaall versions6.3.14npm install karma@6.3.14

Affected Products

1 product · 1 configurations
Application
karmakarma_project
< 6.3.14
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Cross-site Scripting (XSS) - DOM in NPM karma prior to 6.3.14.

huntr.devNVDFeb 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for karma, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update karma to 6.3.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-0437 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

How to detect CVE-2022-0437

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2022-0437 -u https://target
Template
karma-runner DOM-based Cross-Site Scripting
Severity
medium
Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft, session hijacking, or defacement of the affected website.
Remediation
Upgrade to the latest version of karma-runner that includes proper input sanitization to mitigate this vulnerability.

Template by ProjectDiscovery nuclei-templates (pikpikcu), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

Cross-site Scripting (XSS) - DOM in NPM karma prior to 6.3.14.
O3 Security · Impact-Aware SCA

Is CVE-2022-0437 in your dependencies?

Find it across npm, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2022-0437: karma XSS — Fixed in 6.3.14